SQLITE Collation workaround for search

sqlite.collation.search.coffee

searchString = "hello z  World!"

joinWordsToSearch = (words)->words.join(".{0,5}")

getModifiedWords = (words, modificator)->
  modifiedWords = words.slice()
  modifiedWords[i] = modificator(word) for word, i in modifiedWords
  modifiedWords

getRegexpSearchString = (queryString = "")->
  if queryString < 3
    return
    
  rawWords = queryString.split(" ")
  words = []
  words.push(word) for word in rawWords when word
  
  searchStrings = []
  modificators  = [
    (word)-> word
    (word)-> word.toLowerCase()
    (word)-> word.toUpperCase()
    (word)-> word.charAt(0).toUpperCase() + word.slice(1)
  ]
  
  for modificator in modificators
    searchStrings.push  joinWordsToSearch getModifiedWords words, modificator
  
  "(#{searchStrings.join "|" })"
  
  
console.log "getRegexpSearchString : #{JSON.stringify getRegexpSearchString searchString}"